1 files changed, 42 insertions, 0 deletions

diff --git a/mm/mempool.c b/mm/mempool.c
index 9ef13dd68ab7..fe6e05289cc5 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -289,3 +289,45 @@ void mempool_free_slab(void *element, void *pool_data)
         kmem_cache_free(mem, element);
 }
 EXPORT_SYMBOL(mempool_free_slab);
+
+/*
+ * A commonly used alloc and free fn that kmalloc/kfrees the amount of memory
+ * specfied by pool_data
+ */
+void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data)
+{
+        size_t size = (size_t)(long)pool_data;
+        return kmalloc(size, gfp_mask);
+}
+EXPORT_SYMBOL(mempool_kmalloc);
+
+void *mempool_kzalloc(gfp_t gfp_mask, void *pool_data)
+{
+        size_t size = (size_t) pool_data;
+        return kzalloc(size, gfp_mask);
+}
+EXPORT_SYMBOL(mempool_kzalloc);
+
+void mempool_kfree(void *element, void *pool_data)
+{
+        kfree(element);
+}
+EXPORT_SYMBOL(mempool_kfree);
+
+/*
+ * A simple mempool-backed page allocator that allocates pages
+ * of the order specified by pool_data.
+ */
+void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data)
+{
+        int order = (int)(long)pool_data;
+        return alloc_pages(gfp_mask, order);
+}
+EXPORT_SYMBOL(mempool_alloc_pages);
+
+void mempool_free_pages(void *element, void *pool_data)
+{
+        int order = (int)(long)pool_data;
+        __free_pages(element, order);
+}
+EXPORT_SYMBOL(mempool_free_pages);